Cristian Paiz defeated Leonel Alberti 6-7 6-3 6-2 in the Panama F1 round of 16 on clay. The upset overturned the form book — Leonel Alberti came in leading the head-to-head 1–0, but Cristian Paiz had been the form player, winning 1 of their last 4 on clay. Cristian Paiz claimed a first win over Leonel Alberti in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-09-29 | Bolivia F4 | R32 | clay | Leonel Alberti | 6-4 0-6 6-2 |